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结晶器专家系统在宽厚板连铸机上的应用   总被引:1,自引:0,他引:1  
南钢宽厚板连铸机安装了结晶器专家系统,在连铸生产过程中,这套系统对于减少连铸机粘连漏钢发挥了巨大作用。通过结晶器专家系统可以评估各种工艺参数、原材料的适应性,指导处理结晶器内的异常现象。  相似文献   

3.
莱钢炼钢厂集装箱钢的生产中多次发生粘结漏钢,其中一个重要因素就是连铸机机型、断面特殊,保护渣的使用不同于国内其它连铸机,无先例可循。对此问题,炼钢厂与保护渣生产厂家联合攻关多次试验,调整成分性能,最终解决了漏钢问题。  相似文献   

4.
唐向东 《攀钢技术》1997,20(A01):55-58
攀钢连铸因操作不当引起的漏钢数量很大。本文对操作不当引起漏钢的原因进行了分析,提出了防止措施。  相似文献   

5.
连铸是炼钢过程非常重要的工序之一。连铸过程多发漏钢事故,其影响因素多且机理复杂,其中以黏结漏钢最为常见,约占总漏钢事故的70%。连铸漏钢事故造成钢液泄漏,容易发生灼烫、火灾甚至爆炸等安全事故,造成人员伤亡和巨大的财产损失。为解决上述问题,剖析了黏结裂口的扩展方式和黏结漏钢的形成机理;基于热电偶测温法预报黏结漏钢的原理,利用神经网络建立黏结漏钢预报模型,并运用遗传算法完成神经网络的优化,预报模型测试样本的正确报出率达到100%,预报率为97.56%;对空间网络模型进行了验证,A型空间网络模型的输出符合期望,可以实现黏结在空间裂口扩展的预报。模型具有很好的应用价值,可为连铸安全生产提供支撑。  相似文献   

6.
针对本钢BSP投产后发生的漏钢情况,论述了薄板坯连铸机漏钢的原因,通过热相图和漏钢预报系统监控和工艺参数的修改以及钢水成分和温度,工艺操作、保护渣等方面的严格规定,有效地减少漏钢事故的发生。  相似文献   

7.
本文针对酒钢二炼钢厂常规板坯漏钢事故进行详细的分析,借鉴兄弟企业实践经验,结合酒钢二炼钢厂的实际情况,提出解决板坯漏钢问题方向性的建议和意见。  相似文献   

8.
孟征兵 《钢铁研究学报》2005,17(B08):155-160
探讨了CSP连铸机的各种漏钢形式及漏钢原因,同时具体分析了涟钢CSP投产以来18次漏钢原因,列举了预防漏钢需采取的有关措施。  相似文献   

9.
在小方坯连铸生产中,漏钢事故经常发生。本文就实际生产中出现的连铸漏钢事故,从操作、设备、工艺三方面进行了一些分析探讨并提出解决的对策。  相似文献   

10.
郭颖韬  潘辉 《山东冶金》1998,20(5):45-47
对莱钢炼钢厂3^#连铸机1997年1-6月份的漏钢事故进行了统计调查,从中间包温度,钢水成分,结果器振动,水冷系统,调度管理等方面分析了漏钢产生的原因,并提出了改进措施。  相似文献   

11.
The surface disproportionation reaction mechanism of aluminum subchloride on aluminum (110) surfaces has been investigated using the plane-wave density functional theory (DFT). Three possible reaction mechanisms of AlCl disproportionation reaction on aluminum (110) surfaces have been taken into account; the reactants and products structures have been optimized, transition states have been confirmed, and activation energy has been calculated. The adsorption energy of reactants and the desorption energy of products also have been calculated. All of these calculations have been employed to confirm the reaction mechanism and the rate-determining step of AlCl disproportionation reaction on aluminum (110) surfaces.  相似文献   

12.
FeAl合金研究进展与发展方向   总被引:2,自引:0,他引:2  
综述了FeAl合金的物理、力学性质,分析了造成合金延性低的主要原因——环境氢脆的产生原因和影响因素,概述了合金的加工方法和合金设计原则,最后指出了FeAl合金以后的研究重点和发展方向。  相似文献   

13.
高冰镍浸出机理及工艺研究   总被引:3,自引:0,他引:3  
研究了高冰镍和软锰矿在硫酸中的常压浸出过程 ,查明了影响浸出速率和浸出效率的因素 ,阐明了软锰矿、二氧化锰和高冰镍中镍硫化物的溶解机理 ,探讨了浸出过程中β -NiS的生成机理 ,提出了强化浸出的措施 ,进行了浸出正交试验 ,获得了浸出控制的最佳工艺条件  相似文献   

14.
连铸小方坯热应力模型的研究   总被引:1,自引:0,他引:1  
程常桂  邓康  茅洪祥 《炼钢》1999,15(5):28-32
建立了连铸小方坯二维传热数学模型及热弹塑应力频力模型,并用工厂 实际数据进行了验证,同时应用该模型分析了影响连铸小方坯热裂纹的因素,提高预防热裂纹产生的措施。  相似文献   

15.
Tantalate-columbate concentrate has been studied; namely, its chemical, phase, and granulometric compositions and radioactivity have been investigated. The thermodynamics of reactions of chlorination of the components of the concentrate have been calculated in the temperature range of 400–1273 K. A technique of laboratory chlorination has been developed and experiments have been performed at T = 750 and 800°C. The products obtained have been analyzed. The total degree of chlorination of the concentrate, as well as of tantalum and niobium, has been determined at various temperatures.  相似文献   

16.
Prior research has shown that young refugees may be especially traumatised. The study includes 123 young Bosnian refugees, living at two Bosnian boarding-schools in Denmark who were given a revised version of the Harvard Trauma Questionnaire (HTQ). The subjects themselves have on average experienced seven traumatic events, and have either witnessed or had a family member experience an additional six events. Three-quarters have been shot at, have lost their homes and private possession and have been exposed to violence in the form of harassment or humiliation. Two-thirds have lost friends. Three-fifths have lived with uncertainty as to whether friends and family were alive or dead. More than half have seen dead and wounded people, have had their lives threatened and have thought that they would die. More than a third have lost close family members, have been wounded and have had their homes destroyed. Just under a third have been exposed to physical violence or have witnessed somebody being killed. A quarter have starved and been ill without being able to receive treatment. About a fifth have experienced captivity, torture and forced labour. 6% have been raped or exposed to other forms of sexual abuse. It is concluded that the young Bosnians examined are a multitraumatised group. Use of the HTQ increased the number of traumatic events quite considerably compared to the case notes.  相似文献   

17.
Of 96 cancers which have been detected as a result of the first annual screening of 10,470 volunteers, 46 have been clinically occult. Forty-one of these have been Stage 1 or less carcinoma, and 26 of these 41 have been minimal cancer. For the radiographic parameters used, the benefit of detecting these cancers vs. the risk of induced cancer is estimated as 103:1 and 65:1, respectively.  相似文献   

18.
竖炉球团配加巴西精粉的试验研究   总被引:5,自引:1,他引:4  
为提高球团矿品位,改善冶金性能,进行了竖炉球团配加巴西精粉的试验研究。通过成球及焙烧试验,提出了适宜的巴西精粉配比和合理的焙烧制度,并对成品球团矿冶金性能进行了检测,同时对试验结果进行了分析和阐释。  相似文献   

19.
NiAl has been produced by micropyretic synthesis in a tougher state by adding Cr, V, and Fe. The mechanical properties of the alloys have been evaluated. Fracture toughness values as high as 9.5 M Pa√m have been obtained. The effect of different process variables like particle size, diluents, and extent of preheat on the process of synthesis and the microstructure have been ascertained. Diluents, when present in small quantities, have been found to enhance the combustion process in NiAl without significantly affecting the microstructure of the alloy. Preheating of the specimen prior to synthesis however had a profound influence on the microstructure. The microstructures of the alloys have been examined for chemical homogeneity and the defect structure. The sequence of steps leading to the formation of NiAl from elemental powders during the process of micropyretic synthesis has been determined.  相似文献   

20.
No fewer than eight new antiepileptic drugs (AEDs) with diverse mechanisms of action have been introduced into clinical practice in the 1990s. Short monographs on lamotrigine, vigabatrin, gabapentin, oxcarbazepine, felbamate, topiramate and vigabatrin have been prepared for this review. Details are provided of mechanisms of action, clinical pharmacokinetics and adverse drug interactions. Each section concentrates on the efficacy, tolerability and practical use of these drugs. The areas where they have potential for superiority over the established AEDs have been highlighted. Specific indications and dosage schedules have been provided. As many of these AEDs have, as yet, limited licences, an attempt has been made to identify ongoing studies and important omissions. Where possible, the eventual place of the new agent in the pharmacological management of epilepsy has been assessed. A more limited summary has been included of zonisamide which, although licensed in Japan, is still regarded as an investigational drug elsewhere. Short discussions of three of the most promising investigational compounds, namely remacemide, losigamone and levetiracetam, complete the picture.  相似文献   

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